JP2007177404A - Opening/closing mechanism of suspended sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing mechanism of a suspended sliding door, which enables the suspended sliding door to be airtightly closed with no gap between a floor surface and the suspended sliding door in a closed position. <P>SOLUTION: A suspension bolt is assemebled on a suspension unit A by screwing a screw rod 29 in a female screw in a fixing nut 35. The fixing nut 35 has an internally threaded hole in the center. The suspension bolt includes the screw rod 29 and a pinion 30 fixed to the leading end of the screw rod 29, and is provided with a male screw with a pitch corresponding to the internally threaded hole of the fixing nut. Racks 50 and 51, which are fixed to a guide rail 13, have rack teeth 50a and 51a which are in height positions to face the pinion when the sliding door 11 is suspended, and which have such a length as to allow engagement with the pinion to a full closing position from a predetermined position before the sliding door fully closes a door opening 10. In the opening/closing of the sliding door, when the pinion and the rack teeth are engaged with one another so that the suspension bolt can be rotated with respect to the fixing nut into which the screw rod is screwed, the suspension bolt is axially moved depending on that rotation, and the sliding door is hoisted/lowered by the distance of the movement of the suspension bolt. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an opening / closing mechanism for an upper sliding door that engages a door rail with a guide rail fixed to the ceiling side of the door opening and slides the sliding door suspended by the guide rail through the door wheel to open and close the door opening. About.

  Conventionally, among various types of sliding doors, this type of hanging sliding door does not require the installation of a guide member that guides the sliding of the sliding door, such as a sill or rail, on the floor side of the door opening that opens in the wall. Demand is growing as a sliding door that meets the recent demand for barrier-free, eliminating the need for steps on the floor.

  In general, when assembling the upper sliding door, for example, as shown in FIG. 12, the guide rail 3 is fixed to the ceiling side of the door opening 2 that is opened and closed by the sliding door 1, while the hanging bracket 4 is attached to the upper end 1 a of the sliding door 1. The door 4a provided to the mounting and hanging bracket 4 is slidably engaged on the guide rail 3, and the sliding door 1 is suspended so as to be slidable in the opening and closing directions on the left and right in the figure.

  However, when the upper sliding door 1 is assembled, a slight gap 6 is generated between the floor surface 5 due to the structure, and for this purpose, it is suspended as a door of an entrance / exit that requires airtightness such as a bathroom. In some cases, it was necessary to seal the gap 6 as necessary, for example, by additionally providing a water stop structure.

  Therefore, conventionally, when the suspended sliding door slides and approaches the fully closed position, the door is dropped into the recessed groove provided on the guide rail by lever operation, and the sliding door is moved relative to the guide rail by the height of the depression. An open / close mechanism has been proposed that shields the gap with the floor surface by lowering it.

  However, in this conventional opening / closing mechanism of the upper sliding door, when the sliding door is opened, each heavy sliding door is lifted up by holding the operation lever, and the sliding door is slid in the opening direction after the door is taken out from the groove. There is a problem that it is necessary and burdensome to open and close the sliding door, which is troublesome.

  In order to solve the above-mentioned problem, the invention according to claim 1 fixes the guide rail 13 to the ceiling side of the door opening 10 that opens and closes by sliding the sliding door 11, for example, as shown in the following embodiments. On the other hand, a suspension bracket unit A is mounted on the upper end of the sliding door 11, and the door 15 provided in the suspension bracket unit A is slidably engaged on the guide rail 13 to move the sliding door 11 in the opening / closing direction. In the sliding door structure that freely hangs, the suspension bracket unit A is fixed to the door support 34 that supports the door 15 in a lateral direction, and a fixing nut 35 that is formed by screwing a female screw hole 35a at the center, The pinion 30 is fixed to the tip, and the shaft portion is formed by a screw rod 29 in which a male screw having a pitch corresponding to the female screw hole 35a of the fixing nut 35 is formed on the outer periphery. A suspension bolt 20 that is rotatably engaged by being screwed into a female screw hole 35a of the nut 35 is assembled, and the guide rail 13 is placed at a height position facing the pinion 30 when the sliding door 11 is suspended. A rack 50/51 having rack teeth 50a / 51a of a length with which the pinion 30 meshes from a predetermined position before the sliding door 11 fully closes the door opening 10 to a closed position where the sliding door 11 is fully closed. When the sliding door 11 is slid and the door opening 10 is opened and closed, the pinion 30 and the rack teeth 50a and 51a of the racks 50 and 51 mesh with each other, and the suspension bolt 20 is connected to the screw rod. When 29 is rotated with respect to the fixed nut 35 in the screwed state, the suspension bolt 20 moves in the axial direction in accordance with the rotation, and the sliding door 11 is moved by the axial movement distance. Serial to lift the guide rail 13, characterized by comprising.

  The invention according to claim 2 is the opening / closing mechanism of the upper sliding door according to claim 1, for example, as shown in the embodiment shown below, when the screw rod 29 of the suspension bolt 20 is rotated once. , Characterized in that it is formed with one or more threads that move 1 mm or more in the axial direction.

  According to a third aspect of the present invention, in the opening / closing mechanism of the upper sliding door according to the first or second aspect, the guide rail 13 is the screw rod of the suspension bolt 20 as in the illustrated embodiment shown below, for example. The escape groove 45 through which the passage 29 passes is bent and formed into a deformed square pipe shape in the length direction of the lower surface, and a gear guide groove 65 is provided in the length direction on the inner wall surface 13c on the upper side. A pin through hole 30a is provided in the thickness direction of the pinion 30, and an engagement pin 67 urged upward by an urging spring 66 is fitted into the pin through hole 30a, and the pinion 30 of the pinion 30 is passed through the pin through hole 30a. A pin tip 67 a is formed by projecting from the gear plate surface 30 b, and the pin tip 67 a of the engagement pin 67 is in the gear guide of the guide rail 13 in the suspended state of the sliding door 11. When engaged with the groove 13c, and characterized by being prevented from rotating the hanger rod 20.

  According to the first aspect of the present invention, when the sliding door is slid to close the door opening, the pinion of the suspension bracket unit and the rack tooth of the rack on the guide rail side mesh with each other, and the suspension bolt is screwed on the screw rod. When it rotates in one direction with respect to the fixed nut in the combined state, the suspension bolt moves downward in the axial direction according to the rotation, and it is configured to slide and move in the closing direction while gradually lowering the sliding door by the axial movement distance, Accordingly, there is provided an opening / closing mechanism for the upper sliding door that realizes an airtight closing without closing a gap between the upper sliding door and the floor surface in the closed position without requiring a troublesome opening / closing operation with a simple configuration. be able to. When the sliding door is slid in the opening direction from the closed position, if the pinion meshes with the rack teeth of the rack and the suspension bolt rotates in the other direction with respect to the fixed nut with the threaded rod engaged, Accordingly, the suspension bolt is moved upward in the axial direction, and accordingly, the sliding door is configured to move in the opening direction while gradually rising by the axial movement distance of the suspension bolt. As described above, the sliding door can be easily and relatively smoothly slid without any additional burden.

  According to the second aspect of the present invention, the threaded rod of the suspension bolt is formed by one or more threads, so that the suspension bolt can be more effectively pivoted based on the engagement between the rack teeth of the rack and the pinion. The sliding door can be moved up and down by moving up and down in the direction.

  According to the invention described in claim 3, even when an external force such as an impact is applied to the sliding door when the sliding pin is slid in a state where the pinion of the hanging bracket unit is detached from the rack teeth of the rack on the guide rail side, With the engagement of the suspension bolt with the engagement pin and the gear guide groove of the guide rail, the sliding door can be smoothly moved laterally in the opening and closing direction to gently open and close the door opening without being rattled. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a sliding door structure to which the opening / closing mechanism of the upper sliding door of the present invention is applied, in a fully closed state of the sliding door, FIG. 2 is an exploded perspective view of the sliding door structure, and FIG. It is a disassembled perspective view which shows the components structure of a unit. The illustrated sliding door structure includes, for example, a wooden sliding door 11 that opens and closes a door opening 10 that is an entrance of a bathroom, and a door frame 12 that frames the door opening 10 in a rectangular shape. The upper suspension structure is provided so as to be suspended from the ceiling side horizontal frame member 12a of the door frame 12 so as to be slidable in the left and right opening and closing directions.

  For this reason, in the sliding door structure, the upper hanging sliding door 11 is provided with mounting grooves 11b on the door end side and the door bottom side of the upper end surface 11a. And the opening / closing mechanism of the upper sliding door of the present invention comprises a pair of left and right hanging bracket units A mounted on the upper end surface 11a on the door end side and the door bottom side on the sliding door 11 side, while on the door frame 12 side. Is provided with a guide rail 13 that suspends the hanging bracket unit A and guides the sliding movement of the sliding door 11, and a detent catch 14 for a pair of sliding doors.

  The left and right suspension bracket units A each include a mounting bracket B for attaching components that suspend the sliding door 11 to the door end and the door butt side of the upper end surface 11a of the sliding door 11, and a door support bracket that rotatably supports the door pulley 15. C is roughly divided into configurations.

  As shown in FIGS. 3, 4, and 5, one mounting bracket B in the hanging bracket unit A is configured by an attachment frame 18, a sliding door angle adjuster 19, and a suspension bolt 20. The mounting frame 18 is made of metal, and is bent into a channel shape according to the concave shape of the mounting groove 11b of the sliding door 11. The sliding door angle adjuster 19 includes a fixed case 21, a movable frame 22, an adjustment long screw 23, and a guide pin 24. The fixed case 21 is made of resin and is formed in a long box shape with an open top that can be fitted into the mounting frame 18, and coaxially faces the vertically long abutting plate portion 21 a and the rear shaft holding piece portion 21 b. Round screw insertion holes 16 and 17 are provided, respectively, and long side guide holes 26 are provided on both side plates so as to face each other. The movable frame 22 is made of metal, is bent into a channel shape that can be fitted into the fixed case 21, and is provided with restricting holes 27 that are inclined and face each other on both side plate portions 22 a. The guide pin 24 is provided with a female screw hole 28 corresponding to the screw shaft portion 23a of the adjusting long screw 23 and threaded in the radial direction.

  The suspension bolt 20 of the mounting bracket B is particularly composed of a screw rod 29 and a pinion 30 that is fixed to the tip of the screw rod 29. The threaded rod 29 is a male thread having a thread groove so that the threaded rod 29 moves at a pitch corresponding to a female threaded hole 35a of the fixing nut 35, which will be described later, and moves downward in the axial direction when rotated in one direction and upward in the axial direction when rotated in the other direction. Engraved on the outer periphery. The illustrated suspension bolt 20 may be one or more so-called threaded screws that move in the axial direction by 1 mm or more when rotated once as the threaded rod 29. In the illustrated example, a double-threaded screw that moves in the 2 mm axial direction when rotated once is used.

  In the hanging bracket unit A, the other door cart support bracket C is provided with a pair of roller-shaped door carts 15, a door cart support body 34 that rotatably supports the door carts 15, and a fixing nut that is assembled to the door cart support body 34. 35, a rotary oil damper 36, and a guide projection 37 are provided.

  The door support 34 has a rectangular box shape with an open top, and the door 15 is rotatably supported by both side plates, and a nut mounting hole is provided between the doors 15 in the bottom plate along with a relief hole opened for the door. 39, and a fixing nut 35 is fixed to the nut mounting hole 39 in the lateral direction. The fixing nut 35 is formed by screwing a female screw hole 35 a in the center thereof in accordance with the screw rod 29 of the suspension bolt 20. The rotary oil damper 36 rotatably accommodates the rotor in a cylindrical case portion 36a, fills the gap between the outer periphery of the rotor and the inner periphery of the case portion 36a, seals the case portion 36a, and rotates the rotor. The brake torque is generated by the viscous resistance of the oil. The rotating oil damper 36 connects the brake gear 40 to the tip of the rotor shaft protruding from the case portion 36a, and a one-way clutch is disposed between the rotor shaft and the brake gear 40 so that the brake gear 40 rotates in one operation direction. Sometimes the braking torque is generated. The guide protrusion 37 is made of resin, and has a tip portion 37a formed in a protruding shape having sawtooth irregularities on both sides. The door support bracket C screws guide protrusions 37 to the front frame plate 34 a of the door support 34, while the rear frame plate 34 b has a rotating oil damper 36 with a braking gear 40 facing downward via an angle plate 41. It is assembled by screwing.

  Therefore, the suspension bracket unit A screws the threaded rod 29 of the suspension bolt 20 through the shaft insertion hole 42 of the movable frame 22 of the sliding door angle adjuster 19 and further engages with the female thread hole 35a of the fixing nut 35 on the door support bracket C side. Then, after the tip 29a of the screw rod 29 protrudes from the door support 34, the pinion 30 is fixed to the tip 29a, while the base end 29b of the screw rod 29 is pivotally attached by a thrust bearing 43 to be freely rotatable on the movable frame 22. The suspension bolt 20 is erected. On the other hand, the movable frame 22 is fitted into the fixed case 21, and the guide hole 26 and the oblique restriction hole 27 are combined and engaged with the holes 26 and 27 through the guide pins 24, while the screw shaft portion 23 a of the adjusting long screw 23. Is inserted into the screw insertion hole 16 of the fixed case 21, and then screwed into the female screw hole 28 of the guide pin 24, and the tip of the screw shaft portion 23a is further projected from the screw insertion hole 17, and is fixed to the screw tip. The sliding door angle adjuster 19 is assembled by fixing the nut 44. The suspension bracket unit A is fitted with the mounting frame 18 with the opening side facing upward and fitted into the mounting groove 11b of the sliding door 11 shown in FIG. The case 21 is inserted, and the lower end of the abutting plate portion 21a is screwed to the front end 11c and 11d of the vertical wall, and is mounted on the upper end surface 11a on the door end side and the door bottom side and mounted on the sliding door 11.

  On the other hand, the guide rail 13 is bent into a deformed square pipe shape having a clearance groove 45 in the length direction of the lower surface in FIG. A path 46 is formed. The guide rail 13 has a braking rack 47 having rack teeth 47a and 48a respectively corresponding to the braking gear 40 of the rotary oil damper 36 on the inner surface of the side wall near the door end and the door bottom of the one side surface 13a.・ 48 is fixed. On the other hand, lifting racks 50 and 51 having rack teeth 50a and 51a corresponding to the pinions 30 of the suspension bolts 20 are fixed to the other side surface 13b. The detent catch 14 of the sliding door 11 is configured by attaching a leaf spring 55 to the attachment plate 54. The leaf spring 55 is formed by bending the distal ends of a pair of sandwiching pieces 55a bent into a U shape into a square shape facing each other in a convex shape.

  Therefore, the guide rail 13 is fixed to the ceiling side frame member 12a of the door frame 12 with the escape groove 45 facing downward, and the detent catch 14 is arranged so that the sandwiching plate pieces 55a face the opening at both ends of the guide rail 13. At the same time, it is attached to the left and right ends of the ceiling side frame member 12a. On the other hand, on the guide rail 13, the door pulley 15 is slidably mounted on the traveling path 46, and the sliding door 11 is slidably slidable by engaging the pair of suspension bracket units A with the door pulley support bracket C inserted. Include. When the sliding door 11 is suspended, if the orientation of the sliding door 11 is inclined with respect to the vertical frame material of the door frame 12, the installation is finely adjusted. In that case, the door end side end 11b of the sliding door 11 is brought into contact with the door end side vertical frame member 12b, while the sliding door angle adjuster 19 on the door end side is operated to move the sliding door 11 to the fixed side guide. The angle is adjusted by rotating with respect to the rail 13, and the sliding door 11 is positioned so as to be in close contact with the door-end side vertical frame member 12b in the fully closed position. When the angle of the sliding door 11 is adjusted with the sliding door angle adjuster 19, for example, a screwdriver is used, and the adjustment long screw 23 is screwed in one direction depending on the tilted state of the sliding door 11 with respect to the door-side vertical frame member 12b. Turn. Then, according to the screwing direction of the adjusting long screw 23, the guide pin 24 moves laterally along the guide hole 26 of the fixed case 21, while the guide pin 24 moves up and down by being guided by the oblique restriction hole 27 of the movable frame 22. The sliding door 11 tilts with the guide pin 24 as a fulcrum, and the door end side end face 11c is brought into close contact with the door end side vertical frame member 12b without any gap.

  In the sliding door structure to which the opening / closing mechanism of the upper sliding door configured as described above is applied, when closing the sliding door 11, holding the door handle (not shown) and pulling the sliding door 11 along the door pocket wall in the closing direction 6, the door wheel 15 of the hanging bracket unit A rolls and travels on the travel path 46 on the guide rail 13, thereby sliding the sliding door 11 in the closing direction guided by the guide rail 13. . When the sliding door 11 is slid in the closing direction as described above, the braking gear 40 of the rotary oil damper 36 on the door tip side and the door bottom side moves to the rack teeth 47a and 48a of the braking racks 47 and 48 during the sliding movement. Engage with each other and rotate in one direction of operation. Then, the rotating oil damper 36 is actuated to generate a braking force, and the braking gear 40 is rotated in a braked load state, whereby the sliding movement of the sliding door 11 is also braked, and the sliding door 11 is decelerated accordingly. Close slowly and safely.

  On the other hand, when the door opening 10 is opened, if the sliding door 11 is pulled back in the opening direction by holding the door handle, the door wheel 15 similarly rolls and travels on the traveling path 46 on the guide rail 13. 11 is slid by the guide rail 13 to open the door opening 10. Thus, when the door opening 10 is opened and closed by the sliding door 11, the uneven tip end portion 37 a of the guide projection 37 is held by the sandwiching piece 55 a of the detent catch 14, and the sliding door 11 hits the vertical frame member of the door frame 12. Therefore, the sliding door 11 is stopped and held at the open position and the closed position so as not to return to the opposite opening direction or closing direction due to the reaction.

  Now, particularly in the present invention, when the sliding door 11 is guided by the guide rail 13 and slid in the closing direction as described above, the sliding door 11 is in the middle of the sliding movement as shown in FIG. From the predetermined position before fully closing, the pinions 30 and 30 of the hanging bracket unit A on the door end side and the door bottom side mesh with the rack teeth 50a and 51a of the lifting racks 50 and 51, respectively. Move while rotating the shaft. Then, since the screw rod 29 rotates in one direction with the screw rod 29 screwed to the fixing nut 35, the suspension bolt 20 moves downward in the axial direction in accordance with the rotation of the screw rod 29. It slides in the closing direction while gradually descending by the axial movement distance of the suspension bolt 20. Then, as shown in FIG. 1, the sliding door 11 closes the door opening 10 so as to be airtight with the floor surface F without any gap in the closed position. In the illustrated example, the suspension bolt 20 is moved downward by 4 mm in the axial direction of the screw rod 29 of the double thread until the door opening 10 is fully closed by the sliding door 11, and the sliding door 11 is lowered accordingly. Thus, the door opening 10 is closed airtight without any gap between the door opening 10 and the floor surface F.

  Therefore, in the opening / closing mechanism of the upper sliding door of the present invention, when the rack 50/51 is suspended from the guide rail 13, the rack teeth 50a / 51a are connected to the pinions 30/30 as shown in FIG. It is engraved at the position of the meshing height facing the. In addition, the racks 50 and 51 are configured such that the rack teeth 50a and 51a are engaged with the pinion 30 of the suspension bolt 20 from the predetermined engagement position before the sliding door 11 fully closes the door opening 10 to the closed position. It has a structure that is just engraved.

  On the other hand, in the present invention, when the sliding door 11 is slid back from the closed position and pulled back, the sliding door 11 is suspended by the pinions 30 and 30 meshing with the rack teeth 50a and 51a of the lifting racks 50 and 51, respectively. The bolt 20 is moved while rotating in the other direction. Then, since the screw rod 29 rotates in the other direction with the screw rod 29 screwed to the fixing nut 35, the suspension bolt 20 moves upward in the axial direction in accordance with the rotation of the screw rod 29, and according to this, the sliding door 11 slides in the opening direction while gradually rising by the amount of the axial movement distance of the suspension bolt 20. Then, the sliding door 11 rises to the original hanging height position until the engagement between the pinion 30 and the rack teeth 50a and 51a of the lifting racks 50 and 51 is released, and thereafter, the sliding door 11 remains at the hanging height position. Then, the door opening 10 is fully opened.

  By the way, when the sliding door 11 is slid in the opening direction, the sliding door 11 is further opened after the pinions 30 and 30 are disengaged from the rack teeth 50a and 51a of the lifting racks 50 and 51, respectively. As shown in FIG. 1, a meshing avoidance structure is provided so that the door end side pinion 30 does not unnecessarily mesh with the door bottom side lifting rack 51 when the door is slid in the opening direction. In the illustrated example, the installation height position of the rack teeth 51a of the door end side rack 51 is shifted one step lower than the rack teeth 50a of the door end side rack 50, and the suspension bolts are adjusted to the heights of the different rack teeth 50a and 51a. When the pinion 30 of the door-end side lifting bracket unit A passes by the side of the door-side lifting rack 51 with the height of 20.20 different between the door-end side and the door-end side, it meshes with the rack teeth 51a. I am trying not to.

  Further, the engagement avoidance structure of the door-end side pinion 30 can be configured as shown in FIGS. 8 and 9, for example, instead of the illustrated example. In the other example shown in the figure, the rack teeth 50a and 51a of the elevating racks 50 and 51 are provided at the same height, while the door-end side rack 50 is thickened by one step as shown in FIGS. 8A and 9A. The rack teeth 50a are projected and shifted in the thickness direction from the rack teeth 51a on the door bottom side, and the gear diameters of the pinions 59 and 60 are adjusted to match the positions of the different rack teeth 50a and 51a. Unlike the rear side, when the small-diameter pinion 59 of the door end side hanging bracket unit A passes by the side of the lifting rack 51 on the door bottom side, it is prevented from engaging with the rack teeth 51a.

  Further, in the above-described opening / closing mechanism of the upper sliding door, when the sliding door 11 is slid in the opening direction, after the pinions 30 and 30 are disengaged from the rack teeth 50a and 51a of the lifting racks 50 and 51, the sliding door is further opened. As shown in FIGS. 10 and 11, the suspension bolt 20 is not rattled by the suspension bolt 20 when it is subjected to an external force such as an impact when it is slid in the opening direction. A structure is provided. That is, the guide rail 13 is provided with a plurality of gear guide grooves 65 parallel to each other on the upper inner wall surface 13c. On the other hand, the suspension bolt 20 is provided with a plurality of pin through holes 30a in the thickness direction of the pinion 30, and the pin through holes 30a are fitted with engagement pins 67 biased upward by the coil springs 66, respectively. The pin tip 67a protrudes from the gear plate surface 30b of the pinion 30 through 30a.

  In the illustrated example, when the sliding door 11 is pulled back from the closed position in the opening direction, the sliding door 11 slides while gradually rising according to the upward axial movement of the suspension bolt 20, and then the pinions 30 and 30 are moved up and down. When the rack teeth 50a and 51a of the 50 and 51 are disengaged, the engaging pin 67 protruding from the gear plate surface 30b of the pinion 30 is elastically engaged with the gear guide groove 65 by the coil spring 66 on the ceiling side of the guide rail 13. The suspension bolt 20 is prevented from rotating. Therefore, in the illustrated example, when the sliding force is applied to the sliding door 11 when the sliding movement of the sliding door 11 is performed in a state where the pinions 30 and 30 are detached from the rack teeth 50a and 51a of the lifting racks 50 and 51, The suspension bolt 11 can be smoothly moved laterally in the opening and closing direction without causing the suspension bolt 20 to rotate and be rattled by the engagement between the engagement pin 67 and the gear guide groove 65 of the guide rail 13. Can be opened and closed quietly.

  In the example shown in FIG. 1, the heights of the suspension bolts 20 and 20 are different on the door end side and the door bottom side in accordance with the heights of the different rack teeth 50a and 51a of the lifting racks 50 and 51. A meshing avoidance structure was adopted. Therefore, in the suspension structure of the suspension bolt 20 in the illustrated example, when the pinion 30 of the door bottom suspension bolt 20 is disengaged from the rack teeth 51a of the lifting rack 51, the door bottom pinion 30 is engaged with the engagement pin. The pinion 30 of the door-side suspension bolt 20 is formed to have a one-step thickness so that 67 becomes a height position that can be engaged with the gear guide groove 65 of the guide rail 13 (see FIG. 6).

It is a front view which shows the sliding door structure to which the opening / closing mechanism of the upper suspension door of this invention is applied in a fully-closed state. It is a disassembled perspective view of a sliding door structure. It is a disassembled perspective view which shows the components structure of a hanging metal fitting unit. It is an assembly perspective view of a hanging metal fitting unit. FIG. 5 is an assembly perspective view of a hanging bracket unit shown in a different direction from FIG. 4. It is a front view which shows a sliding door structure in a sliding door half-opened state. It is a front view which shows a sliding door structure in the step of a meshing start of a pinion and a rack. (A) is a top view of the sliding door structure which shows the other example of the engagement avoidance structure of a pinion in the half open state of a sliding door, (B) is a front view. (A) is a top view of the sliding door structure which shows the other example of a pinion meshing avoidance structure in the fully closed state of a sliding door, (B) is a front view. It is an end view which shows the guide rail provided with the rotation prevention structure of a suspension bolt, and the suspension metal fitting unit assembled | attached to it. It is a disassembled perspective view which shows the rotation prevention component of a pinion. It is a front view which shows the sliding door structure which applied the opening / closing mechanism of the conventional upper sliding door in a fully-closed state.

Explanation of symbols

A Hanging bracket unit B Mounting bracket C Door support bracket 10 Door opening 11 Sliding door 11a Upper end surface 12 Door frame 12a Ceiling side frame member 13 Guide rail 15 Door wheel 20 Suspension bolt 29 Screw rod 30 Pinion 34 Door wheel support 35 Fixing nut 50 51 rack 50a 51a rack tooth 65 gear guide groove 67 engagement pin

Claims (3)

The guide rail is fixed to the ceiling side of the door opening that opens and closes by sliding the sliding door, while the suspension bracket unit is mounted on the upper end of the sliding door, and the door wheel provided in the suspension bracket unit rolls on the guide rail. In the sliding door structure that freely engages and suspends the sliding door so as to be movable in the opening and closing direction,
The hanging bracket unit includes
A fixing nut that is fixed laterally to a door support that pivotally supports the door, and has a female screw hole in the center;
A pinion is fixed to the tip, and the shaft portion is formed by a screw rod in which a male screw having a pitch corresponding to the female screw hole of the fixing nut is formed on the outer periphery, and the screw rod is screwed into the female screw hole of the fixing nut. Assembling a suspension bolt that pivots freely and
In the guide rail,
The height of the pinion meshes between a predetermined position before the sliding door fully closes the door opening and a closed position at a height position facing the pinion when the sliding door is suspended. Fix the rack with rack teeth,
When sliding the sliding door to open and close the door opening, the pinion meshes with the rack teeth of the rack, and when the suspension bolt rotates with respect to the fixing nut in which the screw rod is screwed, According to the rotation, the suspension bolt moves in the axial direction, and the sliding door is lifted and lowered with respect to the guide rail by the axial movement distance.   The opening / closing of the upper sliding door according to claim 1, wherein the threaded rod of the suspension bolt is formed by one or more number of threads that move 1 mm or more in the axial direction when it rotates once. mechanism. The guide rail is formed by bending a relief groove through which the threaded rod of the suspension bolt passes in the shape of a deformed angle pipe opened in the length direction of the lower surface, and providing a gear guide groove in the length direction on the inner wall surface on the upper side. The suspension bolt is provided with a pin through hole in the thickness direction of the pinion, and an engagement pin biased upward by a biasing spring is fitted into the pin through hole, and the pinion of the pinion is passed through the pin through hole. Formed by projecting the tip of the pin from the gear plate surface, and when the tip of the engaging pin engages with the gear guide groove of the guide rail in the suspended state of the sliding door, the suspension bolt is prevented from rotating. The opening / closing mechanism of the upper sliding door according to claim 1 or 2.

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